QQ客服 官方微博 反馈留言

	Method of making distributed feedback laser having spatial variation of grating coupling along laser cavity length
	DAUTREMONT-SMITH, WILLIAM CROSSLEY; HAYES, TODD ROBERT
	1999-08-24
著作权人	LUCENT TECHNOLOGIES INC.
专利号	US5943554
国家	美国
文献子类	授权发明
其他题名	Method of making distributed feedback laser having spatial variation of grating coupling along laser cavity length
英文摘要	A distributed feedback (DFB) laser is made with a spatially graded optical coupling ( kappa ) between its diffraction grating and its active layer by means of selective area epitaxial growth of the epitaxial layer from which the grating is formed. More specifically, the epitaxial layer is formed on a major surface of a semiconductor substrate on which a mask, such as a silicon dioxide mask, has been formed. The mask has a pair of segments spaced apart by a fixed distance, the segments having spatially variable widths. Advantageously the epitaxial layer has a refractive index that is different from that of the substrate at the operating wavelength of the laser. The epitaxial layer is then etched into stripes. In this way the heights of the resulting grating stripes will be spatially variable, and so will the coupling kappa between the grating and the active layer. In this way, the properties of the optical output of the laswer can be adjusted. Advantageously also, the spacer layer and the substrate have the same refractive indices at the operating wavelength of the laser, whereby accurate control over the depth of the etching is not required.
公开日期	1999-08-24
申请日期	1997-07-22
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/46020]
专题	半导体激光器专利数据库
作者单位	LUCENT TECHNOLOGIES INC.
推荐引用方式 GB/T 7714	DAUTREMONT-SMITH, WILLIAM CROSSLEY,HAYES, TODD ROBERT. Method of making distributed feedback laser having spatial variation of grating coupling along laser cavity length. US5943554. 1999-08-24.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。